Continental Automotive Gmbh

Siemens Aktiengesellschaft

Conti Temic Microelectronic Gmbh

Vitesco Technologies Gmbh

Wolfgang Mai

Jens Pache

Manfred Weigl

Paul Rodatz

Andreas Wildgen

Stephan Heinrich

Rudolf Bierl

Matthias Wiese

Wolfgang Ludwig

Gerhard Eser

Gerd Rösel

Knut Meyer

Markus Roth

Andreas Althof

Stefan Fuehling

Rainer Hild

Stephane Closet

An electric bicycle has an electric motor and an electric energy store for supplying energy to the electric motor. Accordingly, the bicycle has a first controller coupled to the electric motor and is configured to store a first keycode. The bicycle has a second controller coupled to the energy store and is configured to store a second keycode. The controllers are connected or can be connected to a data transmission system, which is a bus. The first and second controllers are configured such that at least one specified controller of the controllers receives the keycode of the other controller. The specified controller is configured to determine whether its keycode matches the received keycode of the other controller using specified criteria. An immobilizer for an electric bicycle can be formed from these components.

Electric bicycle, immobilizer for an electric bicycle and method for operating an electric bicycle

A tank venting apparatus for a supercharged internal combustion engine () has a fuel tank (), a fuel vapor reservoir () connected to the fuel tank () via a connecting line () and to an intake pipe () of the internal combustion engine () via a venting line (), a tank venting valve () which is arranged in the venting line (), and a safety valve () which is arranged in the venting line () between the tank venting valve () and the intake pipe (). The safety valve () is configured so as to permit a gas flow in a blocking direction (S) from the intake pipe () to the tank venting valve () with a certain positive pressure in relation to the pressure at the tank venting valve () is achieved in the intake pipe ().

Tank venting apparatus for a supercharged internal combustion engine and associated control method

During operation of an internal combustion engine system which has at least one sensor for measuring a hydrocarbon content of a gas stream in a line, a temperature is determined at the at least one sensor. If the temperature is greater than a prespecified temperature, the flow of gas through the line is interrupted.

Hydrocarbon sensor to regulate flow rate in a fuel line

A method for controlling a tank ventilation device () for a motor vehicle () is proposed in which first of all a tank vent valve () of the tank ventilation device () is closed. Then, the value of a control signal for the tank vent valve () is increased in the sense of an opening of the tank vent valve () until a leak detection means () associated with the tank ventilation device () recognizes a leak in the tank ventilation device (). The value of the control signal at which the leak in the tank ventilation device () is recognized is identified as the opening control value for opening the tank vent valve (). In this way, the opening control value for the tank vent valve () can be determined with a high frequency and precision.

Method and device for controlling a tank ventilation device for a motor vehicle

A method for rapidly emptying an activated carbon filter while using an HC sensor (concentration change). A device for a tank system, for a motor vehicle having the device for a tank system and to a method for emptying an activated carbon filter for a tank system. The concentration of volatile components which are flushed from the activated carbon filter is detected by a concentration sensor. The concentration sensor is used as an early warning sensor to prevent any disturbances of mixture production of an engine.

Method for rapidly emptying the activated carbon filter while using an HC sensor (concentration change)

An internal combustion engine () has a fuel tank () and a fuel vapor reservoir (). According to the method during the tank vent period&#x2014;before opening the tank vent valve () a reference value is updated if a condition is met, and otherwise the existing reference value is maintained, &#x2014;before opening the tank vent valve () an opening period is determined as a function of at least one variable, &#x2014;the tank vent valve () is controlled such that the flow achieves the target flow value by the end of the opening period that was determined, &#x2014;the load level of the fuel vapor reservoir () is computed based on the reference value, &#x2014;a fuel amount is computed based on the load level, &#x2014;and the fuel amount to be metered by the injection valve () is corrected based on the computer fuel amount.

Method for controlling an internal combustion engine and internal combustion engine

A device and a method for operating an internal combustion engine having at least one cylinder and a tank ventilation system with a line designed to provide pneumatic communication between the tank ventilation system and the at least one cylinder. The line has at least one sensor for determining a hydrocarbon content of a gas flow. A determination, as a function of a measurement signal from the sensor, of a hydrocarbon content of a gas flow flowing from the tank ventilation system to the at least one cylinder is performed. At least one characteristic variable for a fuel quantity to be metered is determined as a function of the determined hydrocarbon content. A metering of fuel into the cylinder is determined as a function of the at least one determined characteristic variable.

Method, device, and system for operating an internal combustion engine

In a method for correcting the fuel concentration in a regeneration gas flow of a tank venting device, the fuel concentration is determined, and a defined regeneration gas flow rate is set and supplied to the engine to use the regeneration gas in the combustion process. Then, a reference composition is determined and the flow rate is varied. Then, a first injection amount correction value is determined based on the fuel concentration and the flow rate adjustment amount. A pre-specified quantity of fuel is corrected by the first correction value and the exhaust gas composition is determined again after the corrected fuel quantity has been supplied. A second correction value is determined by which the corrected fuel quantity is further corrected to set the exhaust gas composition to the reference composition. The fuel concentration of the regeneration gas flow is corrected by the first and the second correction values.

Method and device for correcting the fuel concentration in the regeneration gas flow of a tank venting device

A tank venting device for a motor vehicle has a fuel tank, a fuel vapor accumulator for storing fuel vapors escaping from the fuel tank and a connection line, via which the fuel vapors may flow from the fuel tank into the fuel vapor accumulator. Furthermore, an overpressure line having an overpressure valve is provided, via which the fuel vapors may flow from the fuel tank into the fuel vapor accumulator when the overpressure valve is open. An attachment of the connection line on the fuel vapor accumulator and an attachment of the overpressure line on the fuel vapor accumulator are situated at different points on the fuel vapor accumulator. The operational reliability of a tank venting procedure may thus be increased and the adsorption capacity of the fuel vapor accumulator may be used better.

Tank venting device for a motor vehicle

The tank venting device has a fuel vapor reservoir connected to a fuel tank to deliver escaping fuel vapors to the fuel vapor reservoir, and is connected to the internal combustion engine in such a manner that during a tank venting operation the fuel vapors contained in the fuel vapor reservoir are delivered as regeneration gas. To check the operability of the venting device the fuel concentration in the regeneration gas is ascertained at a minimum of two different points in time during the venting operation. The fuel concentration values in the regeneration gas are compared with respective reference values representing the regeneration gas fuel concentration in the situation in which no additional fuel vapors are delivered during the venting operation. The assessment of the venting device operability is carried out by comparison of the values ascertained for the fuel concentration in the regeneration gas with the reference values.

Method and device for checking the operability of a tank venting device for an internal combustion engine

In a control method for an internal combustion engine () which has a fuel tank (), a fuel vapor storage device () for storing the escaping fuel vapors and a controllable valve () for adjusting the stream of fuel vapors fed to the intake tract () during a period of tank ventilation, the valve () is controlled in such a way according to the method that the stream of fuel vapors varies during the tank ventilation period. The regeneration of the fuel vapor storage device is intended to be improved thereby.

Control method for an internal combustion engine

According to a method for controlling an internal combustion engine by which the tank ventilation operation and an adjustment of the basic mixture can be carried out simultaneously, the engine is operated with an open tank ventilation valve. A first fuel amount correction value is determined for correction of a basic pilot control value for the amount of injected fuel. The regeneration gas volume flow rate is subsequently varied by a predefined change amount. A second fuel amount correction value is determined for correction of the basic pilot control value. Based on the first and second correction values and the flow rate change amount, a third fuel amount correction value is calculated by which the basic pilot control value would have to be corrected to again regulate the exhaust gas composition with a closed tank ventilation valve. Based on the third correction value the basic pilot control value is corrected.

Method and device for controlling an internal combustion engine

To operate an internal combustion engine subvolumes of the fluid flowing into an intake duct in each instance during a predetermined time period are determined for each period. Tank purging values of a characteristic quantity are determined for each period. The characteristic quantity is representative of a tank purging fuel mass, which flowed through the tank purging valve in each instance during the predetermined time period. The successive subvolumes are added together, starting from the currently determined subvolume, to give a total subvolume, until the total subvolume is greater than or equal to an effective intake duct volume downstream of the tank purging valve.

Method and device for operating an internal combustion engine

For the purposes of a determination of a fuel vapor loading level of a fuel vapor retention system of a combustion engine, an opening level of a valve of the fuel vapor retention system is increased in steps or continuously during a determination phase. Furthermore, the valve is activated at most a predefined first period prior to a start of the determination phase by a conditioning pulse at least whenever the valve was closed previously for a second period that is longer than a predefined threshold value. The conditioning pulse is generated in such a way that the valve definitely opens at most for a predefined opening period and then closes again.

Method and device for activating a valve of a fuel vapor retention system

An internal combustion engine has an intake duct, which opens into at least one inlet of at least one cylinder. It also has a tank purging valve, which is configured to control the initiation of a tank purging flow into the intake duct at an inlet point upstream of the respective inlet of the respective cylinder. A main path is configured in the intake duct and a recirculation path is configured there with a recirculation control element, a recirculation inlet from the main path into the recirculation path and a recirculation outlet from the recirculation path into the main path. The recirculation outlet is disposed in the main path upstream in relation to the recirculation inlet. A cylinder tank purging fuel mass is determined as a function of an opening angle of the tank purging valve and an opening angle of the recirculation control element.

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Kronberg, Germany

Wolfgang Mai